Zyxel VES-1616FE-55A [201/318] Double tagging dt

Zyxel VES-1616FE-55A [201/318] Double tagging dt
VES-1616FE-55A User’s Guide
201
CHAPTER 32
Double Tagging (DT)
This chapter shows you how to configure VLAN double tagging on the VES-1616FE-55A.
32.1 Double Tagging Overview
With Double Tagging (DT) enabled, the VES-1616FE-55A can add two tags (C-tag and S-tag)
of the VLAN ID and priority level for untagged packets received from a private network to
those used in the service providers network.
When you enable DT on a port, the port is called a DT access port. The VES-1616FE-55A
adds VLAN tags for untagged traffic but drops tagged traffic flowing through the DT access
ports.
" Double-tagged or single-tagged packets received on the DT access ports are
dropped.
32.2 Configuring DT
Click Advanced Application > DT to open this screen.
Use this screen to view the existing DT entries. It’s recommended that you add a new entry in
this screen only when you want to translate untagged packets into double-tagged ones before
forwarding them.

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